Floor-polishing machine



July 29 1924.

1,503,048 B HUBER FLOOR POLISHING MACHINE I Filed July 16, 1923 2Sheets-SheeLl gig aitozncq 1,503,048 B. HUBER FLOOR POLISHING MACHINEFiled July 1a, 1923 2 smug-shew 2 gnuanto'c Patented July 29, 1924:

MN-E5515, {rigs-inane ascents Ar en?!" FOLFFJHQE.

BERNARDI-IUBER, or" OAKLAND, CALIFORNIA.

'FLGOR-PO'LISHINGMACHINE.

fl'pplication filedv J-uly 11s;

"Improvements in Floor-Polishing Machines,

of which the following is aspecification.

This '7 invention relates to certain new and useful improvements inrfio-or :polishing: machines of "that @type employing an endlesslongitudinally arranged polishing belt which passes around suitablerollers jour naledi-n a wheelediframezhavinga guiding handle. 7

The-primary object of the inventionvisto generally improve and simplifyfloor polishing machines of the above "kind wherebythe same: may meetwith :all 1' the A requirements for a successful commercial use. V

Another objectisto provide a simple and improved construction whereinthe polishing belt is driven' by a motor-for assisting in the travel ofthemachine over the floor, and wherein-simple :an'd effectiveimeans areprovided "for 'maintaining the polishing belt tight. n

Other objects will appear as the nature of the invention isbetterunderstood, andthe same consists in the novel form, combination andarrangement of parts hereinafter more fully described,shown in theaccompanying drawings, and claimed. 7

In the drawings, wherein like reference characters indicatecorresponding *parts throughout the several views, I a

Figure :1 is aiside elevation-a1 viewof a polishing machine constructed:in accordancefwith the present invention,

' Figure 2 is a top plan view of the device shown in Figure 1, withthe-polishing belt removed, V

Figure 3 is a front elevational view of the device shown in Figure 2,and

Figure 4 is an enlarged fragmentary View partly in section and partly inelevation and showing the preferred form of anti-friction bearingemployed for the rollers around which the polishing belt passes.

Referring more in detail to'the several views, the invention embodies apair of spaced parallel longitudinal side frame bars 5 in the forwardends of which are suitably journaled the ends of the shaft of a roller 6of relatively small diameter, upright frame members 7 being rigidlyattached to the rear ends of the frame bars 5 and having bearadjustedposition.

1923. "Seria1 No. '651';824.

ingsinth'e upperiends-thereof in which are j ournaled'the ends ofithe'shaft of a relatively' largeroller 8. Immediately in back of thezrollerbare a ,pair' of upstanding arms 9 having their lower-ends pivoted asat10 to the frame bars 5 for longitudinal swinging movement, and the endsof the shaft of another small roller 11 are suitably journaled'in' theupper-ends of these arms 9. suitable ='polishi:ngbelt 12 of endless formpasses around the rollers6y8 and '11, and

this belt is maintained in :tight condition'by swinging the roller 11forwardly and maintaiining it'in such position by means of rearwardlyinclined links 13 which have their upper forward ends'pivoted'as at late:the armsz9beneath the roller ll andwhich have their lower-endsadjustably connected as at 15' to the side frame bars 15. The:adjustable connection 15 f preferably embodies bolts extendingthroughthe arms 13 andthrough longitudinal elongatedslots 16 in theframe bars-'5, whereby the lower ends'of the links 13"may be movedlongitudinally of the frame bars andzelfectively'clamped'in any desiredThe frameibars 5 are provided with four outwardly "projecting j stubshafts upon which suitable supporting wheels 17 are journaled, i thediameter of these supporting wheels 17 bein'gr such :asto: support theframe bars :5 :atthe required elevation above the floor'soithat'the nap0f thepolishing' belt 12 willengage-the surface of thefloor with:sufficient pressure. V A suitable handle 1 8 isj-provided at the rear ofthe ma'chinje including :a bifurcated inner end portion, the arms ofwhich are respectively: attached as at 1'9 to "the upright lframemember-s' 7 fben'eath the bearings of the rollerl-8. "Theco'nn'ections'19 are pivotal ones so that-the handle 18 may swing verti-Cally to the desired height as required for the particular personoperating the ma chine. c a

The width of the belt 12 is" substantially equal to the length ofthe'rollers 6, 8 and 11, and thelatter extend substantially entirelyacross the space between the side frame bars 5. These frame bars 5 areconnected intermediate their ends by means of a platform 20 which isrigidly attached thereon, and a belt 23 passes around this pulley 22 andalso around the roller 8, a groove 24 being provided in the periphery ofthe roller 8 in which the belt 23 is positioned beneath the polishingbeltlQ. By means of this construction, the belt 12 is motor driven forassisting in the travel of the machine over the floor, in a simple andpractical manner.

As shown in Figure 4, the members which support the ends of the'rollershafts are provided with suitable openings in which anti-frictionbearings are mounted. These bearings preferably include inner raceways25 fixed upon the adjacent shaftend 26 and associated with an outerraceway 27 which is in the form of a flanged bushing. the flange ofwhich engages one face of the supporting member, and the other end ofwhich is screw threaded to receive a. screw ring 28 whereby the outerraceway is effectively clamped to the supporting member. The bearings 29are disposed between the raceways in a well known manner.

The construction and operation of the invention will be readilyunderstood from the foregoing description, and it is to be understoodthat minor changes may be made without departing from the spirit andscope of the invention as claimed.

What I claim as new is:

1. In a floor polishing machine of the class described, a pair ofparallel spaced side frame bars, a roller having a shaft with its endsjournaled in the forward ends of the side frame bars, upstanding framemembers rigidwith the rear end of said frame bars, a second relativelylarge roller having ashaft with the ends of the same journaled in theupper endsof said frame members, a pair of'upst'anding arms having theirlower ends pivoted to the forward portion of the side -frame barsdirectly rearwardly of the first named, roller, for movementlongitudinally of themachine, a roller having a shaft with itsendsournaled in the upper ends of said. arms, a motor, a platform upon whichsaid motor is mounted rigidly connecting the intermediate portions ofthe side frame bars, a polishing belt passing around the rollers aboveand below said motor, means operatively connecting the second namedroller and the motor for driving said polishing belt, means associatedwith said pivoted arms and with the side frame bars for adjusting saidarms in any desired swung position for maintaining the polishing belttight, and relative small supporting wheels carried by said side framebars.

2. In a floor polishing machine of the class described, a pair ofparallel spaced side frame bars, a roller having a shaft with its endsjournaled in the forward ends of the side frame bars, upstanding framemembers rigid with the rear end of said frame bars, a second relativelylarge roller having a shaft with the ends of the same journaled in the.upper ends of said frame members, a pair of upstanding arms having theirlower ends pivoted to the forward portion of the side frame barsdirectly rearwardly of the first named roller, for movementlongitudinally of the machine, a roller having a shaft with itsendsjournaled in the upper ends of said arms, a motor, a platform upon whichsaid motor is mounted rigidly connecting the intermediate portions ofthe side frame bars, a polishing belt passing around the rollers aboveand below said motor, means operatively connecting the second namedroller and the motor for driving said polishing, belt, means associatedwith said pivoted arms and with the side frame bars for adjusting saidarms in any desired swung position for maintaining the polishing belttight, and relative small supporting wheels carried by said side framebars, the means for adjusting the swinging arms including rearwardlyinclined links pivoted to the upper portions of the arms, and boltsattaching the lower ends of the links to the side frame bars, said sideframe bars having longitudinal elongated slots in which said bolts aremovable.

In testimony whereof I affix my signature/ BERNARD HUBER.

